Roebuck, Julian B., author
Charles C. Thomas, 1967
Buku Teks
Adler, Freda
McGraw-Hill, 2007
Multimedia
Adler, Freda, author
McGraw-Hill , 2007
Multimedia
edited by Don M. Gottfredson, Ronald V. Clarke
Aldershot Avebury , 1990
Buku Teks
Hagan, Frank E., author
Kencana, 2013
Buku Teks